8-sinflar uchun maktab ichki olimpiadasiga tuzilgan test savollar
Download 58.5 Kb.
|
8-sinf-fizika
- Bu sahifa navigatsiya:
- 19.__________________________________________ 20.__________________________________________ 21.__________________________________________
- 25.___________________________________________ Tekshirdi: I.Ayitboyev Baxosi: _____________
- 25.___________________________________________ Tekshirdi: I.Ayitboyev Baxosi: _____________ MASALALAR
O`quvchining familyasi ismi: ________________________________________________________
19.__________________________________________ 20.__________________________________________ 21.__________________________________________ 22.__________________________________________ 23.__________________________________________ 24.___________________________________________ 25.____________________________________________Tekshirdi:_I.Ayitboyev_Baxosi:______________'>25.___________________________________________ Tekshirdi: I.Ayitboyev Baxosi: _____________ O`quvchining familyasi ismi: ________________________________________________________
19.__________________________________________ 20.__________________________________________ 21.__________________________________________ 22.__________________________________________ 23.__________________________________________ 24.___________________________________________ 25.___________________________________________ Tekshirdi: I.Ayitboyev Baxosi: _____________ MASALALAR 1.Ikki sharchaga bir xil 5*10-8 C zaryad berilgan. Zaryadlar 3*10-4 N kuch bilan itarishmoqda, sharchalar orasidagi masofani toping ? 2. Sig’imi 400 pF bo’lgan yassi kondensator qoplamalar yuzasi 200 sm2 ga teng. Qoplamalar orasiga shisha plastina qo’yilgan bo’lsa , bunday sig’imli kondensator qoplamalari orasi qancha bo’lishi kerak?Shisha uchun E=7. 3. Eletr zanjiriga ulangan rezistorning qarshiligi 100 . Rezistor uchlari orasidagi kuchlanish 10 V bo’lsa ,undan qancha tok o’tadi? 4. Reostat uzunligi 40 m , ko’dalang kesimining yuzi 0,5 mm2 bo’lgan nikelin simdan yasalgan.Reostat qisqichlaridagi kuchlanish 80 V . Reostat orqari o’tadigan tok kuchi qancha ? Nikelin simning solishtirma qarshiligi 0,4*10-6 m2/m 5. Ko’ndalang kesim yuzi 0.3 mm2 bo’lgan 9 qarshilikli spiral tayyorlash uchun qanday uzunlikda xromel sim kerak boladi? Xromel uchun solishtirma qarshilik 1.4*10-6 m2/m. Download 58.5 Kb. Do'stlaringiz bilan baham: 
|